Fragmentation, leaching and catabolism are some of the important steps of decomposition. Study the following statements I , ii and iii regarding these and select the correct option.
(i) Detritivores (e.g., earthworm) breakdown detritus into smaller particles.
(ii) Water soluble inorganic nutrients go down into soil horizon and get precipitated as unavailable salts.
(iii) Decomposers (e.g., bacteria and fungi) secrete digestive enzymes and degrade detritus into simpler inorganic substances.

Options

A. `{:("Leaching","Fragmentation","Catabolism"),("(i)","(ii)","(iii)"):}`
B. `{:("Leaching","Fragmentation","Catabolism"),("(iii)","(ii)","(i)"):}`
C. `{:("Leaching","Fragmentation","Catabolism"),("(ii)","(i)","(iii)"):}`
D. `{:("Leaching","Fragmentation","Catabolism"),("(ii)","(iii)","(i)"):}`

Explanation

To solve the question regarding the statements about decomposition, we will analyze each statement in relation to the processes of fragmentation, leaching, and catabolism.

**Step 1: Analyze Statement (i)**
Statement (i) claims that "Detritivores (e.g., earthworm) breakdown detritus into smaller particles."
- This statement is true. Detritivores, such as earthworms, play a crucial role in the decomposition process by breaking down larger organic matter (detritus) into smaller particles. This process is known as fragmentation.

**Step 2: Analyze Statement (ii)**
Statement (ii) states that "Water soluble inorganic nutrients go down into soil horizon and get precipitated as unavailable salts."
- This statement is also true. Leaching refers to the process where water-soluble nutrients are washed down through the soil layers, and some of these nutrients can precipitate as unavailable salts in the soil horizon.

**Step 3: Analyze Statement (iii)**
Statement (iii) mentions that "Decomposers (e.g., bacteria and fungi) secrete digestive enzymes and degrade detritus into simpler inorganic substances."
- This statement is true as well. Decomposers, including bacteria and fungi, are responsible for catabolism, where they secrete enzymes that break down complex organic materials into simpler inorganic substances.

**Conclusion:**
All three statements are correct. Therefore, the correct option that encompasses all three statements is the one that indicates that all statements are true.

### Final Answer:
The correct option is that all statements (i), (ii), and (iii) are true.

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